Su Xiao took the Sea King's Horn from Baja. This item could only be lent to Octopus Bro, not given to him permanently. The Sea King's Horn had other uses related to the final stage of the quest. This had been mentioned in the description of the second stage of the Main Quest.
"The Sea King's Horn can't be given to you."
"Why? What use do you have for it? Isn't lifting the curse more important? Pugugu~"
Octopus Bro sighed. The sound of his sigh was like a very rhythmic fart.
"I can lend it to you."
"Lend it? I'm not sure it'll still be intact after I use it to pull out the Soul Arrows."
Octopus Bro spread his tentacles. He had lived for over two hundred years, but his mind wasn't old. That was because he spent most of his time under the sea, sleeping for half a year at a time. On top of that, he was an extreme homebody. If he hadn't sensed that the captain of the Doom had obtained the Sea King's Horn, he wouldn't have left home at all. He would have remained cooped up in his underwater palace.
"That works too. Then lend it to me, and you can have all the Soul Arrows."
"..."
Su Xiao said nothing, merely smiling. Even if he couldn't butcher the strongest sea beast, he still intended to try to get its soul essence.
"Brother Octopus, we have some private matters to discuss. Could you step away for a moment?"
As Baja spoke, he shot Bubu Wang a look. Bubu Wang contacted Eminem and hung a lantern at the bow. Seeing this, Octopus Bro jumped into the sea.
A black mist vortex appeared, and the Doom returned to Vanishing Light Island. More than ten minutes later,